light will
illuminate
if the charge voltage
reaches
approximately
16
volts.
Assuming
that
the malfunction was
only
momentary, an
attempt
should be
made to
reactivate
the
alternator system.
To
do
this, turn
both
sides
of
the
master
switch
off and
then
on
again,
If
the problem
no
longer
exists,
normal
alternator
charging will
resume
and the warning light will
go
off,
If
the light comes on again,
a
malfunction
is
confirmed. In
this
event,
the flight should
be
terminated and/or
the
current drain
on
the
battery
minimized because the
battery
can supply the
electrical system for
only
a limited period
of
time.
If
the emergency
occurs-at
night, power must
be
conserved for later use
of
the landing
lights
and
flaps
during landing.
INSUFFICIENT
RATE
OF CHARGE.
If
the
ammeter indicates
a
continuous
discharge rate
in flight, the
alternator is
not supplying power to the
system
and should
be
shut
down
since the
alternator field circuit
may
be
placing an
unnecessary
load
on
the
system.
All
non-essential
equipment should
be
turned "OFF" and the
flight
terminated as
soon as
practical.
ROUGH
ENGINE
OPERATION OR LOSS OF
POWER.
SPARK
PLUG
FOULING.
A
slight
engine
roughness
in flight may be caused
by one
or
more
spark
plugs becoming fouled
by
carbon
or
lead deposits.
This may
be
verified
by
turning the ignition switch momentarily
from
"BOTH" to
either
the
"L'"
or
"R" position.
An
obvious power
loss
in
single ignition
operation
is
evidence
of
spark plug
or
magneto
trouble.
Assuming
that
spark plugs
are
the
more likely
cause,
lean
the
mixture
to the
normal
lean
setting
for cruising
flight.
If
the problem does
not
clear
up
in
sev-
eral
minutes,
determine
if a
richer
mixture setting will produce smoother
operation.
If not,
proceed
to the
nearest airport for
repairs
using the
"BOTH" position
of
the ignition switch
unless
extent
roughness dictates
the
use
of
a
single-ignition
position,
MAGNETO
MALFUNCTION.
A
sudden engine
roughness
or
misfiring is
usually evidence
of
mag-
neto
problems.
Switching from
"BOTH"
to
either
the
"L'
or
"R" ignition
switch position will identify which magneto
is
malfunctioning.
Select
different power
settings
and enrichen the
mixture
to
determine
if contin-
ued operation
on
"BOTH" magnetos
is
practicable.
If
not, switch to the
good
magneto and
proceed
to the
nearest airport for repairs.
3-2
Summary of Contents for 182 1973
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